ISD94100 Series Technical Reference Manual
Sep 9, 2019
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Rev1.09
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USB Endpoint Status Register 1 (USBD_EPSTS1)
Register
Offset
R/W Description
Reset Value
USBD_EPSTS1
0x024
R
USB Device Endpoint Status Register 1
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
EPSTS11
EPSTS10
7
6
5
4
3
2
1
0
EPSTS9
EPSTS8
Bits
Description
[31:16]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[15:12]
EPSTS11
Endpoint 11 Status
These bits are used to indicate the current status of this endpoint
0000 = In ACK.
0001 = In NAK.
0010 = Out Packet Data0 ACK.
0011 = Setup ACK.
0110 = Out Packet Data1 ACK.
0111 = Isochronous transfer end.
[11:8]
EPSTS10
Endpoint 10 Status
These bits are used to indicate the current status of this endpoint
0000 = In ACK.
0001 = In NAK.
0010 = Out Packet Data0 ACK.
0011 = Setup ACK.
0110 = Out Packet Data1 ACK.
0111 = Isochronous transfer end.
[7:4]
EPSTS9
Endpoint 9 Status
These bits are used to indicate the current status of this endpoint
0000 = In ACK.
0001 = In NAK.
0010 = Out Packet Data0 ACK.
0011 = Setup ACK.
0110 = Out Packet Data1 ACK.
0111 = Isochronous transfer end.